kontainer-js/IsoBmff/Box/CompactSampleSizeBox.js

A media file format generator/parser that exposes a React-like API.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = undefined;

var _slicedToArray2 = require('babel-runtime/helpers/slicedToArray');

var _slicedToArray3 = _interopRequireDefault(_slicedToArray2);

var _getPrototypeOf = require('babel-runtime/core-js/object/get-prototype-of');

var _getPrototypeOf2 = _interopRequireDefault(_getPrototypeOf);

var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _createClass2 = require('babel-runtime/helpers/createClass');

var _createClass3 = _interopRequireDefault(_createClass2);

var _possibleConstructorReturn2 = require('babel-runtime/helpers/possibleConstructorReturn');

var _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);

var _get2 = require('babel-runtime/helpers/get');

var _get3 = _interopRequireDefault(_get2);

var _inherits2 = require('babel-runtime/helpers/inherits');

var _inherits3 = _interopRequireDefault(_inherits2);

var _Box = require('./Box');

var _Box2 = _interopRequireDefault(_Box);

var _FullBox2 = require('./FullBox');

var _FullBox3 = _interopRequireDefault(_FullBox2);

var _PropTypes = require('../../core/PropTypes');

var _PropTypes2 = _interopRequireDefault(_PropTypes);

var _Writer = require('../../core/Writer');

var _Writer2 = _interopRequireDefault(_Writer);

var _Reader = require('../../core/Reader');

var _Reader2 = _interopRequireDefault(_Reader);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var CompactSampleSizeBox = function (_FullBox) {
  (0, _inherits3.default)(CompactSampleSizeBox, _FullBox);

  function CompactSampleSizeBox(props) {
    (0, _classCallCheck3.default)(this, CompactSampleSizeBox);
    return (0, _possibleConstructorReturn3.default)(this, (0, _getPrototypeOf2.default)(CompactSampleSizeBox).call(this, CompactSampleSizeBox.COMPACT_NAME, props, 0, 0));
  }

  (0, _createClass3.default)(CompactSampleSizeBox, [{
    key: 'serialize',
    value: function serialize(buffer) {
      var offset = arguments.length <= 1 || arguments[1] === undefined ? 0 : arguments[1];

      //console.log('--- CompactSampleSizeBox.serialize enter.');
      var props = this.props;
      var fieldSize = props.fieldSize;
      var sampleSizeEntries = props.sampleSizeEntries;

      var base = offset,
          num = void 0;

      base += (0, _get3.default)((0, _getPrototypeOf2.default)(CompactSampleSizeBox.prototype), 'serialize', this).call(this, buffer, base);
      base += _Writer2.default.writeNumber(0, buffer, base, 3); // reserved(24)
      base += _Writer2.default.writeNumber(fieldSize, buffer, base, 1);
      base += _Writer2.default.writeNumber(sampleSizeEntries.length, buffer, base, 4);

      for (var i = 0, il = sampleSizeEntries.length; i < il; i++) {
        if (fieldSize === 4) {
          if (i % 2 === 0) {
            num = (sampleSizeEntries[i] & 0x0F) << 4;
            if (i === il - 1) {
              base += _Writer2.default.writeNumber(num, buffer, base, 1);
            }
          } else {
            num |= sampleSizeEntries[i] & 0x0F;
            base += _Writer2.default.writeNumber(num, buffer, base, 1);
          }
        } else {
          base += _Writer2.default.writeNumber(sampleSizeEntries[i], buffer, base, fieldSize / 8);
        }
      }

      (0, _get3.default)((0, _getPrototypeOf2.default)(CompactSampleSizeBox.prototype), 'setSize', this).call(this, base - offset, buffer, offset);

      //console.log(`--- CompactSampleSizeBox.serialize exit. size=${this.size}`);
      return this.size;
    }
  }], [{
    key: 'parse',
    value: function parse(buffer) {
      var offset = arguments.length <= 1 || arguments[1] === undefined ? 0 : arguments[1];

      var base = offset,
          readBytesNum = void 0,
          props = void 0,
          fieldSize = void 0,
          sampleCount = void 0,
          entrySize = void 0,
          sampleSizeEntries = [];

      var _FullBox$parse = _FullBox3.default.parse(buffer, base);

      var _FullBox$parse2 = (0, _slicedToArray3.default)(_FullBox$parse, 2);

      readBytesNum = _FullBox$parse2[0];
      props = _FullBox$parse2[1];

      base += readBytesNum;

      base += 3; // skip reserved

      var _Reader$readNumber = _Reader2.default.readNumber(buffer, base, 1);

      var _Reader$readNumber2 = (0, _slicedToArray3.default)(_Reader$readNumber, 2);

      readBytesNum = _Reader$readNumber2[0];
      fieldSize = _Reader$readNumber2[1];

      base += readBytesNum;

      if (fieldSize !== 4 && fieldSize !== 8 && fieldSize !== 16) {
        fieldSize = 8;
      }

      var _Reader$readNumber3 = _Reader2.default.readNumber(buffer, base, 4);

      var _Reader$readNumber4 = (0, _slicedToArray3.default)(_Reader$readNumber3, 2);

      readBytesNum = _Reader$readNumber4[0];
      sampleCount = _Reader$readNumber4[1];

      base += readBytesNum;

      for (var i = 0; i < sampleCount; i++) {
        if (fieldSize === 4) {
          if (i % 2 === 0) {
            var _Reader$readNumber5 = _Reader2.default.readNumber(buffer, base, 1);

            var _Reader$readNumber6 = (0, _slicedToArray3.default)(_Reader$readNumber5, 2);

            readBytesNum = _Reader$readNumber6[0];
            entrySize = _Reader$readNumber6[1];

            base += readBytesNum;
            sampleSizeEntries.push(entrySize >>> 4 & 0x0F);
            if (i !== sampleCount - 1) {
              sampleSizeEntries.push(entrySize & 0x0F);
            }
          }
        } else {
          var _Reader$readNumber7 = _Reader2.default.readNumber(buffer, base, fieldSize / 8);

          var _Reader$readNumber8 = (0, _slicedToArray3.default)(_Reader$readNumber7, 2);

          readBytesNum = _Reader$readNumber8[0];
          entrySize = _Reader$readNumber8[1];

          base += readBytesNum;
          sampleSizeEntries.push(entrySize);
        }
      }

      props.fieldSize = fieldSize;
      props.sampleSizeEntries = sampleSizeEntries;

      return [base - offset, props];
    }
  }]);
  return CompactSampleSizeBox;
}(_FullBox3.default);

exports.default = CompactSampleSizeBox;


CompactSampleSizeBox.COMPACT_NAME = 'stz2';

CompactSampleSizeBox.propTypes = {
  version: _PropTypes2.default.oneOf([0, 1]),
  fieldSize: _PropTypes2.default.oneOf([4, 8, 16]),
  sampleSizeEntries: _PropTypes2.default.arrayOf(_PropTypes2.default.number)
};

CompactSampleSizeBox.defaultProps = {
  version: 0,
  fieldSize: 8,
  sampleSizeEntries: []
};

CompactSampleSizeBox.spec = {
  container: 'stbl',
  quantity: _Box2.default.QUANTITY_EXACTLY_ONE,
  mandatoryList: []
};